Car truck



ux 3 N INVENTOR Harold Y Carpenter K BY c ATTORNEYS Oct. 5, 1943.

H. Y. CARENTER I CAR TRUCK Filed May 23, 1941\ yluponcushioning springsyvliich are;y

` f couplers.

' after described. and .particularly set forth iniithei l40 Egon innalzano Y.

a rp'gingerital"s:traijisversegseotioy wslightly modied construetion. 1

` This 4` invention "relates tto raiiway @and more particularly `to trucks ,for "ice of the'typein ,Whighfthe kblSteI;

c .zp'ort's "fortlieffopposite ends offfthe bolst Y 5 isleebelpf the ',oooompanvmg drawing lsho,

opposi Ude )gfeQ'nstru'ction-` f l .u eierjringf to the .aooomplanyine draws ,,indioatdtgenerally `byfthe1min 4- I sian upper `cornpfres'sion chord 2 and y'a lower tho frame in which journal boxes-4 are" pro- "tlrokibolstr 6./ Theiewerpension Chamis lquite weil established thatithe Sqft ess e thesi 4e Y*fraines of the truclgandthe 'supl side'ef thetnlok onlvpitlloeins I n construction is dulolioefoodet` ".of the, truck, as is usual ,in gear f l tension chord \3which connect l` the v'endportionsl ded. f grue woofer and lower chords @nd lere Y and ks d liianges' xt'ning upwardly from ef yriale given a load is afdirect. function ofthe de- Wbb .7.. Int he portionvof thechord betweenthe;

nectien of ,the'ftraekspnngsz ,undergstatiol loadumrfxs thegflariges'are extended laiggauylqo 5 vide,lionizonftal seats' v9. The llateral] l @seating portions of the f cloord.nie1 deflectionj cannotr ,be ,proviied lbecause fof the y ln'nistrengthenedt by suitable means such A.as in tations imposed-by coupler"heights.y I, n ggussetsel. 'I

f listhe Primary obieotof theowentimommn The;V

`In other words, the -greater'the delectidofnthefito provide, a kfreightcarftruck whichisfsuiteble if m Withwebs 4Il facing theybolsterl rec ng for heavy lloadsand which is also capa/ble, ofk ef-So pe Irl/gy I ht loads. W H towardtheendsgofrthe frame;y 1n thefrlower fectively cushioning verygvlig,Y .Avfurthor object-of myvmvhiion Sito-provvide .,atruck in `which anincreased spring geflection is --provided but, in which the movement ffrthe olster l l does not exceed thelimitations imposed bygthe` 135 andesuitable gmeans ;is-prOV.C1ed ',forpreventing rovidedf-With"g-veigticalslots-13; The bolster itis lWith the above and oherg-objectsin inventionfmaybe said,tocomprisletheftl'llokesilg lustroted -111 the accompanying .drawingeh reinappended claims, together with suohfverations u able cushioning springs such asta nest of: yeen andrmodications thereof -as will be apparents() springs |,"5\,hchks` nterposedgbetween thebolster- .e one skilled inthe Vartgtorvvhich the inven 121,ox1fper.k l

1 filfallli` Opening beneath the bolster. The

tod providesuitable seats forthe supportingkcoil --drawng forminea .part omhis. specincationffin i `which: ,Y

ertical columns 5. may als-ooe.' of channel ,ariside flanges I2- Aexten'cling'from he u r ortionsstheyeof the websfl'l, of, the columns de,botwe entheiupoor portions of thefcolumns A vtilting movements of the 'sigle frames with respeetj ew the .;tofthe ;`-pc 1s`ter. Ashereinv shown, theybolster is Y Y de dwithlguide `flanges 1A/whichoverlie,the Y l t eridfofthe bolster 531s lsumvorted upon suit- 5 a'pllilg-ip1ate-ilr5 which is mounted 'gin ;the Reference should hadxtothe acc,ompanrving.y l5-,plate Hil isof generally rectangular form ngs I5.; lherein shown, live compressionY Figure'l is agsideeelevationlof 4atrucl:enilacdyf cgil springs |5 are mounted upon the plate t6, ing theginveifition,r Y portions ofgthefsideuframe, the plate being Vprovided with a circularfia'ngey {bolster-land bolsterl supportingelexnents beingL t50 fl 15 extendingaroundthecenter of its'upperitace provide a? centraluspring seat Hlandl with yligzgZlis ajseetiontakenon thelin indio Wed Y y i 1 i3-heinforathe fourremainingcoil-springs.ofthe F1 isaseotootwm on-,theilinenndieated o5 v J., mi

,dalfilangosi al 9. :which :provide .spaces between The carrier 2i! has end portions 25 extending,

laterally from the upwardly extending portions 24 and upwardly offset with respect to the central plate supporting portion thereof. tions 25 of the carrier extend through the vertical slots I3 of the guide columns and are provided with semi-bearings 26 which engage withvlcaps 21 supported upon the upper vends of the compression coil springs 28 which are mounted in the channel of the bottom chord closelyadjacent the outer sides of the webs- I`I of the columns. The iianges 8 and I2 of the bottom chord and columns 5 provide housings or pockets forthe are designed to cushion the loads up to thefull capacity of the car,-whereas the springs` 28 are designed to cushion loads lighter than that of va heavily loaded car. When the car is empty or Q lightly loaded, the springs 28 are active and because of their greater deflection do mostof the cushioning. When the load imposedupon the bolster is increased beyond a predetermined amount, the springs 28 are collapsed to an extent sufcient to permit the plate I6 to -rest uponthe seats 9, so that heavy loads are cushioned by the springs I5 only. ,A

The truck is thus cushioned by a light set'of springs when the car is lightly loaded, thereby giving the best possible ride under allconditions. Since the two sets of springs are in effect in series, the rate of deection of the combination is such that a greater deflection is obtained from a given load, with the result that an Veasier ride, is given to the load when both sets of springs are in action than would be givenvto a load by either set of springs acting alone.

i lSince under certain conditionsof loading impacts may cause the plate I6 to bump against the seats 9, pads 29 of suitable cushioning material, such as fabric and rubber, may be provided on the seats 9.

The bolster supporting springs may besupported upon a spring plank 3U supported at its ends by the carrier member 20, as shown in Fig. 4 of the drawing. As shown in Fig. 4, a supporting plate 3I similar to the plate I6 is mountedupon the carrier 2G and is provided with lugs 32 which extend through apertures 33 in the spring plank to hold the spring plank in position.

Since the permissible overall height of a truc frame has already been established by the railroads, a problem is encountered in providing invention avoids this dilculty by the useofthe' The end por- U-shaped carrier which permits the tops oi the lower springs 28 to be considerably above the bottoms of the upper springs I5. 'I'his construction makes it possible to approach a condition in which both sets of springs are seated near the same level even though the springs are disposed in series, so that little or no more vertical space is occupied by the springs than is required for a single set of springs.

i It is to be understood that variations and modifications of the specific devices herein shown and described for purposes of illustration, may be made without departing from the spirit of the invention. What I claim is:

1. A car truck having side frames, each comprising top and bottom chords and spaced columns connecting said chords and forming a central opening, said columns having vertical slots in the sides thereof facing said opening, a bolster ihaving its ends guided for vertical movement in the openings of theside frame, a plate mounted in eachside frame opening beneath the bolster, plate supporting members mounted for bodily movement vertically in said opening, said members underlying the plates and extending laterally through the slots of said columns, springs interposed between said plates and the ends of the bolster, and springs positioned outwardly of said columns and interposed between said laterally extending supportingv members and the bottom chords of the side frames, the latter springs being of' a' size and capacity suilicient to normally e ysupport the plate and plate supporting members above and-clear of the bottom chord.

y2. A car truck having'lside frames, each comprising top and bottomchords and spaced columns connecting saidchords and forming a central opening, said columns having vertical slots in the, sides thereof `facing said opening, a bolster having its ends guided for vertical movement in the openings of the side frame, a plate mounted in each' side frame opening beneath the bolster, plate supporting members mounted for bodily movement vertically in saidopening, said members underlying the plates and extending laterally through the slots of said columns, springs interposed between said plates and the ends of .the bolster, and springs positioned outwardly of 'said columns and interposed'between said laterally extending supportingmembers and the bottom chords of therside frames, the latter springs y normally holding said plates spaced above the bottom `chordbut `beingcompressible to permit said plates'to seat upon the bottom chord upon the imposition of a predetermined load.

The present n v 3. A car truck'having side frames, each comprising top and bottom chords yand spaced columns connecting the chords and forming therewith central yopenings in the side frames, each bottom chord being of channel form with a bottom web and upwardly extending `side anges, the side flanges being provided with laterallyrextending seating portions, said columns having vertical slots intermediate the inner and outer .sides thereof, springs mounted in the bottom chord channel outwardly of said columns and adjacent thereto, a plate mounted for vertical movement in each side frame opening,` each plate being of a widthrg'r'eater than the bottom chord, overlying said 'seating portions and engageable therewith, plate supporting' members extending i through said slots rand yieldab'lysupported upon said springs to normally support said plates clear of and above said seating portions; springs seated supported upon said lastv mentionedsprings,

upon said plates, Vand abolster having itsy ends extending into said side frame openings and'supported upon saidy last mentioned springs.r4

flanges, said carrier member havingnpwardly j Offset end Portions extending through'saidcol umn slots, springs positioned outwardly ofgsaidr '4. A car truck having side frameseachj com- 1.

`prising top and bottom chords and spacedcol umns connecting the chords land forming therewith central openingsinthe side frames, v`each bottom chord being A,of ychannel form with abottom web and upwardly extending side flanges,

the side iianges being provided with laterally ex-` tending seating portions, said columns having vertical slots intermediate the inner and outer f sides thereof, springs mounted in the bottom chord Channel outwardly of said columns and ad` y jacent thereto, a Aplate mounted in `eachfv side frame opening, each `plate lbeing of a `width extending into said 'side frame openings and i 5j. A car truck having a side` frame comprising n top and bottom chordsand'spaced 'columns connecting the chords and forming therewith a cen'- tral opening in the side frame, the portion 'of p Vthe'bottorn chord at the bottom ofl said opening vvbeing of lchannel Aform witha bottom vweband upwardly extending 'side flanges, said'columns having vertical slots intermediate the inner ,and

outer sides thereof, a verticallyr movable carrier n member having a central horizontal supporting *f Y ff portion positioned between the bottom chord flanges, said horizontal portion being 'movable to a' position in whichits upper edge is at the level of the top ledge of the bottom chordside columns and interposed between the endsy of said carrier`member and said bottom chord to' normally support the horizontal portion of Said'car-r rlermember above the web ofthevbottom'zchord', 1 j i', a plate'vsupported upon the central portion fof; said 4 carrier ,l member and engageable with the f j ilangesoithe bottomv chord upon compresrsicvm'r of said'fspringsa bolster having'an endpguided for vertical movement in the side frame opening above said opening plate, and cushioning Springs" 1 s interposedy between said bolster land plate. 1

- 6. AA freight car truckhaving'side `frames, each comprising' top and bottom "chords and (spaced columns connectingV the, chords and 'formingy Y l therewith central 'openings in the sidekframesp l a bolster having its ends guided for vertical move- Y ments insaid openings, a carriermember mount'-v ted in each oofthe Vside frames andguidedgby said columns for vertical movements insaidopen-Hj; f ing, each carrier extending longitudinally ofthe Y' frame andr across ythe opening thereof beneath l the bolster and past said columns, aV plate supported kby each carrier member withinfsaid openings, bolster supporting "and,y cushioning springs f interposed between the ends of the 'bolster end -r A' said plates, carrier supporting springs interposed ,y

betweenjthe portions of the carrier membersexf tending past said columns and the bottom chords of the side `frames, `the latter? springs beingof af capacity to support said plates above the bottom chords under the weightof an empty or lightly i n loaded car, said carrierfsupporting springs., being Y softer than the bolster-supporting springs 'tov ei.""t

' fectively cushion the car when empty or lightly o y loaded. l

HAROLD Y.'CARPizrrrnzn..y 

